"How do you know" is to the fundies as garlic is to vampires. Even if they do summon the nads to approach it, all we get is more mythology.
At the age of five, Skagra decided emphatically that God did not exist. This revelation tends to make most people in the universe who have it react in one of two ways - with relief or with despair. Only Skagra responded to it by thinking, 'Wait a second. That means there's a situation vacant.'